Machine for bending cast-iron.



No. 813,141. PATENTED FEB. 20, 1906.

:B. s. OOWLES. MACHINE FOR BENDING CAST IRON. APPLICATION FILED AUG.1-7, 1904.

N NT 'T' Why/55555.-

mnrnn STATlBLS ELXEENT OFFICE.

BURTON S. COWLES, OF PLAINVILLE, CONNECTICUT, ASSIGNOR TO THE COWLES ENGINEERING CORPORATION, OF NEW HAVEN, CONNECTI- CUT, A CORPORATION OF CONNECTICUT.

Specification of Letters Patent.

Patented Feb. 20, 1906.

Application filed August 17, 1904. Serial No. 221,087.

To all whom, it may concern:

Be it known that I, BURTON S. CowLEs, a citizen of the United States, residing in Plainville, in the county of Hartford and State of Connecticut, have invented a new and useful Improvement in Machines for Bending Cast- Iron, of which the following is a specification.

My invention relates to a machine for bending cast-ironthat is, for giving to a rod (for example) of cast-iron a permanent bend.

My invention will be set forth in the claims.

As is well known, ordinary castironsuch, for example, as gray castironis quite fragile, and it has been considered to be impossible to give to it a permanent bend without substantial fracture unless it is first converted into some other form of iron-such, for example, as malleable iron; but I have discovered that, for example, gray cast-iron may even when cold be given a permanent bend by suitably manipulating it, and in the drawings I have shown one embodiment of a machine for doing so and which I have found successful in actual practice in bending cold piston-rings made of gray cast-iron.

The drawings show the preferred form of my invention in front elevation in Figure 1 and side elevation in Fig. 2.

A B represent a frame formed of two parts pivoted together at H and fastened in place by a pin I.

C is a supporting-anvil in the form of a roll, having its face preferably entirely smooth and journaled in the lower part of the frame.

F is a bending member and is a roll, as shown, of one-half of the diameter of the an- I vil C and which may, if desired, be mounted in sliding journal-blocks c c, which may be adjusted by the screws G G, so that the pressure desired may be given to a rod of iron passed through between the rolls.

E is a crank for driving the roll F.

The bending-roll F has its face knurled to form projections close together around its circumference. With my machine shown in the drawings having a bending-roll of less diameter than the supporting-roll the rod takes a bend downwardthat is, toward roll or anvil C. By rotating roll F a continuous succession of pressures is given to the rod between the rolls. Obviously as the roll F rotates the successive projections on its face come into successive contact with and embed themselves into the rod while it is still held firmly between the two rolls at a point farther onthat is, at the point where the rolls are closest together. The smooth face of the lower roll gives a smooth surface of one face of the iron, which is usually desirable. By regulating the pressure of the screws G G the iron may be expanded slightly, if desired, or particular portions of the iron expanded. to any desired extent.

What I claim is 1. In a machine for bending cast-iron in combination, a single supporting-roll and a bending-roll directly above the supportingroll between which a rod of iron may be passed, the face of said bending-roll knurled, substantially as described.

2. In a machine for bending cast-iron in combination, a supporting-roll and a bending-roll of one-half the diameter of the supporting-roll, said bending-roll having its face knurled, substantially as described.

3. In a machine for bending cast-iron in combination, a supporting-roll, a bendingroll adjacent to the same whereby a bar of iron may be passed through and compressed between said rolls, said bending-roll of smaller diameter than the diameter of the supporting-roll and having its face knurled, substantially as described.

BURTON S. COWLES.

Witnesses:

A. M. BUNN, GEO. M. CoPENHAvER. 

